1. Mass – the amount of matter in an object. An elephant has a lot of mass. A leaf has very little mass.

2. Customary Measure – Mass/Weight The following are customary units for measuring Mass/weight 1 pound (lb)= 16 ounces (oz) 1 ton (T)= 2,000 pounds

3. Mass- Ounce One slice of bread weighs about 1 ounce. The abbreviation for ounce is oz.

4. Mass - Pound A loaf of bread weighs about 1 pound. The abbreviation for pound is lb. 16 ounces equal 1 pound.

5. Mass- Ton A bread truck weighs about 1 ton. The abbreviation for ton is T. 2,000 pounds equal 1 ton.

6. Approximate Nearly exact; not perfectly accurate or correct: The approximate time was 10 o'clock.

7. Mass - Metric milligram A metric unit for measuring mass 1,000 milligrams = 1 grammetric unitmass gram (g) A metric unit for measuring mass 1,000 milligrams = 1 grammetric unitmass kilogram (kg) A metric unit for measuring mass 1,000 grams = 1 kilogrammetric unitmass

8. Gram A paperclip weighs about 1 gram. The abbreviation for gram is g.

9. Kilogram The lady’s barbell weighs about 2 Kilograms.